High-temperature and high-rotating-speed sealing device suitable for industrial gearbox

Abstract

The utility model discloses a high-temperature and high-rotating-speed sealing device suitable for an industrial gear box, which comprises an end cover arranged at the input end of the gear box and a non-contact sealing ring arranged on an input shaft of the gear box, and an outer sealing ring in elastic contact with a gear box shell is arranged on the inner side face of the end cover. An inner sealing ring in elastic contact with an input shaft of the gearbox is arranged in a bearing hole of the end cover, annular throttling teeth are arranged on the side face, close to the end cover, of the non-contact sealing ring, an annular throttling groove is formed in the inner side face of the end cover, the throttling teeth are located in the throttling groove, and the throttling teeth and the throttling groove are not in contact. The input end of the improved gearbox has double seals, the sealing performance is improved, the gearbox can adapt to the working condition environment of high temperature and high rotating speed of the input end, the utilization value of the remanufactured gearbox is improved, and the purpose of recycling resources is effectively achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of gear box remanufacturing, in particular to a high-temperature and high-speed sealing device suitable for industrial gear boxes. Background Art

[0002] Gearbox is an important component widely used in mechanical transmission. It is a resource-based product with heavy material consumption, high energy consumption and high pollution. With the development of material industry standardization in recent years, heavy material consumption can be recycled sustainably. Key technologies such as gearbox redesign, remanufacturing and re-resourceization can fundamentally solve the above-mentioned resource and environmental shortcomings and energy-saving ecological environment. Most of the existing gearboxes are difficult to meet the sealing requirements at high temperature and high speed. In order to realize the reuse of old gearboxes, we designed a device for transforming old gearboxes to make them suitable for the high temperature and high speed working conditions of the input end of industrial gearboxes. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a high-temperature, high-speed sealing device suitable for industrial gear boxes, so that old gear boxes can adapt to new working conditions, improve the utilization value of remanufactured gear boxes, and effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-temperature, high-speed sealing device suitable for an industrial gearbox, comprising an end cover installed at the input end of the gearbox and a contactless sealing ring installed on the input shaft of the gearbox, the inner side surface of the end cover is provided with an outer sealing ring that is in elastic contact with the gearbox housing, the bearing hole of the end cover is provided with an inner sealing ring that is in elastic contact with the input shaft of the gearbox, an annular throttling tooth is provided on the side of the contactless sealing ring close to the end cover, an annular throttling groove is provided on the inner side surface of the end cover, the throttling tooth is located in the throttling groove and the two are not in contact.

[0005] As a preferred technical solution of the utility model, an oil retainer ring is arranged between the end cover and the contactless sealing ring, and the oil retainer ring is installed on the input shaft of the gear box.

[0006] As a preferred technical solution of the utility model, the outer side surface of the end cover is provided with reinforcing ribs.

[0007] As a preferred technical solution of the utility model, the cross-sections of the throttling teeth and the throttling grooves are both in a "convex" shape.

[0008] As a preferred technical solution of the utility model, the number of the throttling teeth is not less than two, and the two or more throttling teeth are arranged in concentric circles, and the number and position of the throttling grooves correspond to the throttling teeth.

[0009] Compared with the prior art, the beneficial effects of the utility model are as follows: the device is used to modify an old gearbox, and the input end of the modified gearbox has a double seal, which improves the sealing performance, enables the gearbox to adapt to the high temperature and high speed working environment of the input end, improves the utilization value of the remanufactured gearbox, and effectively achieves the purpose of resource recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the structure of the utility model;

[0011] Figure 2 This is a cross-sectional view of the structure of the utility model;

[0012] Figure 3 This is an exploded view of the structure of the utility model.

[0013] In the figure: 1 end cover, 2 non-contact sealing ring, 3 outer sealing ring, 4 inner sealing ring, 5 oil retaining ring, 6 throttle tooth, 7 throttle groove, 8 reinforcement rib. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0015] See also Figure 1-3 The utility model provides a technical solution: a high-temperature and high-speed sealing device suitable for an industrial gearbox, comprising an end cover 1 installed at the input end of the gearbox and a contactless sealing ring 2 installed on the input shaft of the gearbox, the outer side surface of the end cover 1 is provided with a reinforcing rib 8 for improving the overall strength of the end cover 1, the inner side surface of the end cover 1 is provided with an outer sealing ring 3 elastically in contact with the gearbox housing, the bearing hole of the end cover 1 is provided with an inner sealing ring 4 elastically in contact with the input shaft of the gearbox, the contactless sealing ring 2 and the inner sealing ring 4 form a double seal, which greatly reduces the possibility of oil leakage in the gearbox, an oil retaining ring 5 is provided between the end cover 1 and the contactless sealing ring 2, and the oil retaining ring 5 is installed on the input shaft of the gearbox, during the operation of the gearbox, some lubricating oil is inevitably present between the contactless sealing ring 2 and the end cover 1, and the function of the oil retaining ring 5 is to prevent the lubricating oil from splashing into the bearing hole of the end cover 1 to dilute the grease therein;

[0016] An annular throttling tooth 6 is arranged on the side of the contactless sealing ring 2 close to the end cover 1, and an annular throttling groove 7 is arranged on the inner side of the end cover 1. The throttling tooth 6 is located in the throttling groove 7 and the two do not contact each other. The number of throttling teeth 6 is not less than two, and more than two throttling teeth 6 are arranged in a concentric circle. The number and position of the throttling grooves 7 correspond to the throttling teeth 6, so that the gap between the throttling tooth 6 and the throttling groove 7 is tortuous, so that the sealed lubricating oil produces a throttling effect when passing through the tortuous gap, which plays a role in preventing leakage. At the same time, since there is a gap between the throttling tooth 6 and the throttling groove 7, there is no solid contact, no lubrication is required, and thermal expansion is allowed, so it can adapt to high temperature, high pressure, high speed and frequency occasions. The cross-sections of the throttling tooth 6 and the throttling groove 7 are both "convex" shaped, which increases the tortuosity of the gap between the throttling tooth 6 and the throttling groove 7 and enhances the throttling effect. At the same time, since the "convex" shaped throttling tooth 6 and the throttling groove 7 do not have an inclined surface, they are also easier to process and easier to control the processing accuracy, which can effectively reduce the production cost.

[0017] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high temperature and high speed sealing device suitable for industrial gearboxes, characterized in that: The invention comprises an end cover (1) installed at the input end of a gearbox and a contactless sealing ring (2) installed on the input shaft of the gearbox, an outer sealing ring (3) elastically contacting with the gearbox housing is arranged on the inner side surface of the end cover (1), and an inner sealing ring (4) elastically contacting with the input shaft of the gearbox is arranged in the bearing hole of the end cover (1); An annular throttling tooth (6) is arranged on the side of the contactless sealing ring (2) close to the end cover (1), and an annular throttling groove (7) is arranged on the inner side of the end cover (1). The throttling tooth (6) is located in the throttling groove (7) and the two are not in contact.

2. The high temperature and high speed sealing device suitable for industrial gearbox according to claim 1, characterized in that: An oil retainer ring (5) is arranged between the end cover (1) and the contactless sealing ring (2), and the oil retainer ring (5) is mounted on the input shaft of the gear box.

3. The high temperature and high speed sealing device suitable for industrial gearbox according to claim 1, characterized in that: The outer side surface of the end cover (1) is provided with a reinforcing rib (8).

4. The high temperature and high speed sealing device suitable for industrial gearbox according to claim 1, characterized in that: The cross sections of the throttling tooth (6) and the throttling groove (7) are both in a "convex" shape.

5. The high temperature and high speed sealing device suitable for industrial gearbox according to claim 1, characterized in that: The number of the throttling teeth (6) is not less than two, and the two or more throttling teeth (6) are arranged in a concentric circle shape, and the number and position of the throttling grooves (7) correspond to the throttling teeth (6).

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